In 2018, the UK amended the Misuse of Drugs Regulations 2001—not the 1971...

https://lorenzooann734.trexgame.net/why-is-the-licensed-vs-unlicensed-point-so-misunderstood-with-uk-medical-cannabis

In 2018, the UK amended the Misuse of Drugs Regulations 2001—not the 1971 Act—to allow specialist doctors to prescribe cannabis-based medicines like Sativex and Epidyolex